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Bugged Telnet

when-ever i try to connect to a site using telnet it gives an error(s).find screen dump is below...

++++++++++++++++++++++++++++++++++++++++++++++
C:\>telnet www.yahoo.com 80
Connecting To www.yahoo.com...Could not open a connection to host on port 80 : Connect failed
++++++++++++++++++++++++++++++++++++++++++++++

i`ve tried to connect to a number of sites (even which have open ports) but every time it shows the following either of two errors......
* cannot resolve host
*could not open a connection.............(same as above screen dump).

My System Config's r.....
*Win2k workstation(s) on lan with Win2k server.
*i work on "user" account but "have access to administrator account of local machine".
*i guess there may be firewall at the back(only guess, i dont know how to detect the presence of firewall).

i tried to contact system admin, but he is a dumb fellow.

this problem have troubled me since past few days.may be with the help of geeks here i can get through it.

If this solves the problem, then there is something wrong with your DNS.

Another idea, it could be the firewall, if you don't control it. It would make perfect sense for a smart admin to disable all outbound traffic not on port 80 if it doesn't need to be there. Try contacting him again and talking 'slowly'.

One Who Watches is correct. When you telnet to a site with the command prompt in windows, the screen will go black, and you will not 'see' the commands you enter. But if you type some crap in and hit enter a few times, you will see that it was working fine, and that you were connected correctly.